#!/usr/bin/env bash
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# https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html
SCRIPT_NAME="$(basename "$0" 2>/dev/null)"
[ "$DEBUGGER" = "on" ] && echo "Enabling debugging" && set -o pipefail -x$DEBUGGER_OPTIONS || set -o pipefail
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export PATH="/usr/local/etc/docker/bin:/usr/local/bin:/usr/bin:/usr/sbin:/bin:/sbin"
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# run trap command on exit
trap 'retVal=$?;[ "$SERVICE_IS_RUNNING" != "true" ] && [ -f "/run/init.d/$EXEC_CMD_BIN.pid" ] && rm -Rf "/run/init.d/$EXEC_CMD_BIN.pid";exit $retVal' SIGINT SIGTERM EXIT
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# import the functions file
if [ -f "/usr/local/etc/docker/functions/entrypoint.sh" ]; then
  . "/usr/local/etc/docker/functions/entrypoint.sh"
fi
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# import variables
for set_env in "/root/env.sh" "/usr/local/etc/docker/env"/*.sh "/config/env"/*.sh; do
  [ -f "$set_env" ] && . "$set_env"
done
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# Custom functions

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# execute command variables
WORKDIR=""                                        # set working directory
SERVICE_UID="0"                                   # set the user id
SERVICE_USER="root"                               # execute command as another user
SERVICE_PORT="8000"                               # port which service is listening on
EXEC_CMD_BIN="aria2c"                             # command to execute
EXEC_CMD_ARGS="--conf-path=/etc/aria2/aria2.conf" # command arguments
PRE_EXEC_MESSAGE=""                               # Show message before execute
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# Other variables that are needed
etc_dir="/etc/aria2"
conf_dir="/config/aria2"
www_dir="/usr/local/share/ariang"
data_dir="$(grep -Rs 'dir=' "/config/aria2/aria2.conf" | awk -F'=' '{print $2}')"
get_config="$(find "$www_dir/js" -name 'aria-ng-*.min.js' | grep -v 'f1dd57abb9.min' | head -n1)"
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# use this function to update config files - IE: change port
__update_conf_files() {
  local port="${SERVICE_PORT:-8000}"
  [ -d "$etc_dir" ] || mkdir -p "$etc_dir"
  [ -d "$data_dir" ] || mkdir -p "$data_dir"
  [ -d "/data/logs/aria2" ] || mkdir -p "/data/logs/aria2"
  cp -Rf "$conf_dir/aria2.conf" "$etc_dir/aria2.conf"
  ln -sf "$conf_dir/aria2.session" "$etc_dir/aria2.session"
  if [ -f "$etc_dir/aria-ng.config.js" ]; then
    rm -Rf "$get_config"
    ln -sf "$conf_dir/aria-ng.config.js" "$get_config"
    ln -sf "$conf_dir/aria-ng.config.js" "$www_dir/js/aria-ng-f1dd57abb9.min.js"
  fi
  __replace "REPLACE_RPC_PORT" "$SERVICE_PORT" "$etc_dir/aria2.conf"
  if [ -n "$RPC_SECRET" ]; then
    echo "Changing rpc secret to $RPC_SECRET"
    if grep -sq "rpc-secret=" "$etc_dir/aria2.conf"; then
      __replace "REPLACE_RPC_SECRET" "$RPC_SECRET" "$www_dir/js/aria-ng.config.js"
      __replace "REPLACE_RPC_SECRET" "$RPC_SECRET" "$etc_dir/aria2.conf"
    else
      echo "rpc-secret=$RPC_SECRET" >>"$etc_dir/aria2.conf"
    fi
  else
    __replace "rpc-secret=" "#rpc-secret=" "$etc_dir/aria2.conf"
  fi

  return 0
}
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# use this function to setup ssl support
__update_ssl_conf() {

  return 0
}
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# function to run before executing
__pre_execute() {

  return 0
}
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# script to start server
__run_start_script() {
  local workdir="${WORKDIR:-$HOME}"
  local cmd="$EXEC_CMD_BIN $EXEC_CMD_ARGS"
  local user="${SERVICE_USER:-root}"
  local lc_type="${LC_ALL:-${LC_CTYPE:-$LANG}}"
  local home="${workdir//\/root/\/home\/docker}"
  local path="/usr/local/bin:/usr/bin:/bin:/usr/sbin"
  case "$1" in
  check) shift 1 && __pgrep $EXEC_CMD_BIN || return 5 ;;
  *) su_cmd "$cmd" || return 10 ;;
  esac
}
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# process check functions
__pcheck() { [ -n "$(type -P pgrep 2>/dev/null)" ] && pgrep -x "$1" &>/dev/null && return 0 || return 10; }
__pgrep() { __pcheck "${1:-EXEC_CMD_BIN}" || __ps aux 2>/dev/null | grep -Fw " ${1:-$EXEC_CMD_BIN}" | grep -qv ' grep' | grep '^' && return 0 || return 10; }
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# Allow ENV_ variable
[ -f "/config/env/$EXEC_CMD_BIN.sh" ] && "/config/env/$EXEC_CMD_BIN.sh" # Import env file
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WORKDIR="${ENV_WORKDIR:-$WORKDIR}"                            # change to directory
SERVICE_USER="${ENV_SERVICE_USER:-$SERVICE_USER}"             # execute command as another user
SERVICE_UID="${ENV_SERVICE_UID:-$SERVICE_UID}"                # set the user id
SERVICE_PORT="${ENV_SERVICE_PORT:-$SERVICE_PORT}"             # port which service is listening on
EXEC_CMD_BIN="${ENV_EXEC_CMD_BIN:-$EXEC_CMD_BIN}"             # command to execute
EXEC_CMD_ARGS="${ENV_EXEC_CMD_ARGS:-$EXEC_CMD_ARGS}"          # command arguments
PRE_EXEC_MESSAGE="${ENV_PRE_EXEC_MESSAGE:-$PRE_EXEC_MESSAGE}" # Show message before execute
SERVICE_EXIT_CODE=0                                           # default exit code
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
printf '%s\n' "# - - - Attempting to start $EXEC_CMD_BIN - - - #"
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# ensure the command exists
if [ ! -f "$(type -P "$EXEC_CMD_BIN")" ] && [ -z "$EXEC_CMD_BIN" ]; then
  echo "$EXEC_CMD_BIN is not a valid command"
  exit 2
fi
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# check if process is already running
if __pgrep "$EXEC_CMD_BIN"; then
  SERVICE_IS_RUNNING="true"
  echo "$EXEC_CMD_BIN is running"
  exit 0
fi
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# show message if env exists
if [ -n "$EXEC_CMD_BIN" ]; then
  [ -n "$SERVICE_USER" ] && echo "Setting up service to run as $SERVICE_USER"
  [ -n "$SERVICE_PORT" ] && echo "$EXEC_CMD_BIN will be running on $SERVICE_PORT"
fi
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# Change to working directory
[ -n "$WORKDIR" ] && mkdir -p "$WORKDIR" && __cd "$WORKDIR" && echo "Changed to $PWD"
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# Initialize ssl
__update_ssl_conf
__update_ssl_certs
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# Updating config files
__update_conf_files
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# run the pre execute commands
[ -n "$PRE_EXEC_MESSAGE" ] && echo "$PRE_EXEC_MESSAGE"
__pre_execute
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WORKDIR="${WORKDIR:-}"
if [ "$SERVICE_USER" = "root" ] || [ -z "$SERVICE_USER" ]; then
  su_cmd() { eval "$@" || return 1; }
elif [ "$(builtin type -P gosu)" ]; then
  su_cmd() { gosu $SERVICE_USER "$@" || return 1; }
elif [ "$(builtin type -P runuser)" ]; then
  su_cmd() { runuser -u $SERVICE_USER "$@" || return 1; }
elif [ "$(builtin type -P sudo)" ]; then
  su_cmd() { sudo -u $SERVICE_USER "$@" || return 1; }
elif [ "$(builtin type -P su)" ]; then
  su_cmd() { su -s /bin/sh - $SERVICE_USER -c "$@" || return 1; }
else
  echo "Can not switch to $SERVICE_USER: attempting to run as root"
  su_cmd() { eval "$@" || return 1; }
fi
if [ -n "$WORKDIR" ] && [ "${SERVICE_USER:-$USER}" != "root" ]; then
  echo "Fixing file permissions"
  su_cmd chown -Rf $SERVICE_USER $WORKDIR $etc_dir $var_dir $log_dir
fi
if __pgrep $EXEC_CMD_BIN && [ -f "/run/init.d/$EXEC_CMD_BIN.pid" ]; then
  SERVICE_EXIT_CODE=1
  echo "$EXEC_CMD_BIN" is already running
else
  echo "Starting service: $EXEC_CMD_BIN $EXEC_CMD_ARGS"
  su_cmd touch /run/init.d/$EXEC_CMD_BIN.pid
  __run_start_script "$@" |& tee -a "/tmp/entrypoint.log"
  if [ "$?" -ne 0 ]; then
    echo "Failed to execute: $EXEC_CMD_BIN $EXEC_CMD_ARGS"
    SERVICE_EXIT_CODE=10 SERVICE_IS_RUNNING="false"
    su_cmd rm -Rf "/run/init.d/$EXEC_CMD_BIN.pid"
  fi
fi
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exit $SERVICE_EXIT_CODE